Christian bnsmingeki



O. ENSMINGER.

(No Model.)

BOW SAW.

Patented Aug. 5

u. PETERS, PhaQw-M ogmkm. Wailmnghm. a. c.

llNiTEo STATES CHRISTIAN ENSMINGERI, OF ALBANY, ASSIGNOR OF ONE-HALF TO BENJAMIN F. EATON, OF COXSACKIE, NEW YORK.

BOW-SAW.

SPECIFICATION forming part of Letters Patent No. 303,138, dated August 5, 188

Application filed Mayll, 1884.

To all? whom it may concern.-

Be it known that I, CHRISTIAN ENSMINGER, a citizen of the United States, residing at Albany, in the county of Albany and State of 5 New York, have invented certain new and useful Improvements in Bow-Saws, of which the following is a specification.

My invention relates to certain improvements on the saw embodying the invention set to forth in Letters Patent of the United States,

No. 66,690, granted to A.W. Elmer and myself July 16, 1867; and it consists in the combination of devices hereinafter described and particularly-set forth.

The object of my invention is to provide means by which the saw-blade willbe securely held with the straining-frame, and be readily adjusted andset at any desired angle in relation to said frame; also, to provide means by which the tension of the saw-blade in the straining-frame maybe readily increased or lessened, and the operator be enabled to turn the cutting-edge of the saw-blade to any situation in relation to the frame. I attain these objects by the means illustrated in the acco1n panying drawings, forming a part of this specification, in. which- Figure 1 represents a side view of a saw embodying my in1provements,with parts broken away to expose hidden parts thereof. Fig. 2 is a sectional view taken at linel in Fig. 1. Fig. 3 is a sectional view taken at line 2 in Fig. 1.

The same letters ofreferen ce refer to like parts throughout the several views. 3 5 In the drawings, A represents the strainingframe. B is the saw, and C is the handle. In the saw in patent beforereferred'to one end of the saw is held by a pin in a slit made in the forward end of the frame, and the opposite end of 40 the saw is held by a pin with a shank working in a sleeve made inthehandlc end of the frame, and passing through the same into the handle and engaging with a; screw-threaded nut set into the rear end of the handle.- In this form of 5 construction the saw-blade is held in the same position in relation to the straining-frame. In my invention I provide with the forward end of the saw frame the sleeve A, having a smooth bore, (5. (Shown by full lines in Fig.3, 5e and by dotted lines in Fig. 1.) Looselyworking in this bore of sleeve A. is the swivel-pin (No model.)

D, in the inner end of which is made slits, Fig. 3,which slit receives the front end of the saw. The opposite end of this swivel-pin D is provided with shoulder b and athumb-stem handie, 0, for convenience of turning the swivelpin in sleeve A". The saw is secured in slit 8 of swivel-pin D by pin (Z. The opposite or handle end of the straining-frame is also provided with a smooth-bore sleeve, A", similar to smooth-bore sleeve A. W'orking loosely in this sleeve A so .as to turn therein, is the shank-pin D, the forward end of which is provided with slit s,which receives the rear end of the saw, and pin (1, which secures the end of the saw in said slit and holds it with shankpin D. Swivel shank-pin D is made with an extension of length rcarwardly from the rear end of sleeve A nearly equal to the length of handle 0, as shown in Fig. l, and has one side thereof made with a flat surface, c, Fig. 2, while its other portions of surfaces are made circular,

as shown in the same figure. The rear end of this sh ank-pin is provided with a screw-thread j,wl1ich works into the screw-threaded nut'let 7 into the outer end of handle 0.

Arranged on shank-pin D,' and between handle 0 and sleeve A is the linger-wrench E. (Shown in Figs. 1 and 2.) This finger-wrench is provided witha central bore, 6, correspond- 8o ing in size and form so as to nicely fitwith the shank-pin D and hold with the flattened side 6 thereof, and turn the same when it (the wrench) is turned,while at the same time the said shank-pin maybe freely moved longitudi, 8 5 nally in either direction within said wrench. This wrench is provided with finger-handle c, of any desired form, for convenience in turning said wrench in either direction. When fingerwrench E is held from turning, handle 0 may be freely turned in either direction for straining the saw in its frame or slacking the tension of the same. hen the handle is slackened on the shank-pin, the operator may readily turn the same, together with'the saw-blade, 5 in either direction, by turning the fingerwrench correspondingly, and by this wrench the saw-blade may be set at any relative angle with the strainingframe, as illustrated by full and dotted lines in Fig. 3, without removal of I0 the saw-blade, as the swivel-pin D, connected with the forward end of the saw, will freely turn in sleeve A when the finger-wrench is made to turn the swivel shank-pin D and the saw-blade connected with both pins D and D. The operator may, if he prefers, turn the sawblade to any angle in relation to the strainingframe, when the handle is tightened on screwthread f of shanlepin D,hy turning swivel-pin D and shank-pin D simultaneously by means of thefinger-stem handle 0 and fin ger-wrench E.

These improvements are applicable to saws for sawing metals, and enable the operator to readily adjust and set the saw-blade at any relative angle in relation to the saw-frame, and obviate the necessity of removing the sawblade for adjusting the same, as heretofore re quired.

Having described my invention, what I claim, anddesire to secure by Letters Patent, is

1. In a bow-saw having a straining-frame in which its limbs are provided with smooth-bore sleeves A" and A, holding the swivel-pins D D, which connect with the saw-blade, the shoulder Z) on swivel-pin D,and finger-wrench E, loosely mounted on the swivel shank-pin D between the screw-tightening handle 0 and" sleeve Afland holding with said pin for turning the same and the connected saw in either di- A and the screw-tightening handle 0, substantially as and for the'purposes set forth.

CHRISTIAN ENSMINGER. \Vitnesses:

ALE SELKIRK, Jr., CHARLES SELKIRK. 

